3. IO a. How are major and minor device numbers used? Explain. b. What are two differences between block devices and character devices? c. What advantages does memory-mapped I O have over I/O ports? Explain d. Compare RAID level 1 fault tolerance with RAID level 4. e. What is the main advantage of RAID level 5 over RAID level 4? Show transcribed image text 3. IO a. How are major and minor device numbers used?
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